Improvement in hot-air furnaces



2 Shcets--She etl N. TOYE, Hot Air Furnace. No. 167,631, PatentedSept.14, I875.

N- PETERS, PHOTO-LITHOGRAPHEH. WASHINGTON, D C.

2 Sheets--Sheet2.

N. TOYE. -....Hot.,Air Furnace.

N0, l67,63\, Patented Sept.14,1875.

(/ (I St [men 6 or UNITED STATES.

PATENT OFFICE.

NAPOLEON TOYE, OF OOVINGTON, KENTUCKY.

IMPROVEMYEINT IN HOT-AIR FURNACES..

. Specification forming part of Letters Patent No. 167,631, datedSeptember 14, 1875; application filed April 13, 1875. 1

bining a new combination of parts for. consuming the smoke. Y

My improvements for the consumption of the smoke-that is, the dark andwhite vapors generated during combustion consists in the arrangement ofa perforated plate in connection with the bridge wall of the furnace, insuch a manner that air admitted at the front of the furnace shall passover the fire, and .pass partly over and partly through this plate, andpass thence down between said plate and bridge-wall into the bed of thefire, where the oxygen of this now heated air unites with the volatilevapors generated from the fuel, and by the aid of the intense heatthereat they are'ignited and consumed.

The second part of my invention consists in making the sides of thefurnace incline outward from the highest point at which the fuel is tobe placed therein down as far as the grate-bars, so that as the fuel isconsumed and settles, a space shall be left between the side of thefurnace and the fuel, whereby the side of the furnace is kept freefromclinker, and said space forms a burning-surface, air being admittedto said space from a suitable source, preferably the ash-pit.

In the accompanying drawings forming part of this specification, Figure1, Sheet 1, represents a vertical-central longitudinal section of afurnace, embodying my improvements. Fig. 2, Sheet 2, represents avertical transverse section of the same furnace, taken at the line X Y,Fig. l; and Fig. 3, Sheet 2, represents a vertical transverse section ofthe same furnace, taken at the line a b, Fig. 1.

The furnace A is provided with walls B, preferably of brick. There areat the front 0 of the furnace three openings, D E F, connecting theexterior and interior of the furnace. The top of the uppermost opening Dis preferably at the inner roof of the combustion-chamber X, the openingbeing used for the introduction of fuel and air into the furnace. Tocarry into effect the latter object the door a is provided withperforations or damper h. Opening E has a door, I), and is on a levelwith the grate I, and is of use for drawing the grate-bars. Opening-Ehas door d giving access to the'ashjpit Z. H is the rear wall ofcombustion-chamberj-X, and extending backward and downward from the topof the same to a point a little over half the height of thecombustion-chamber. From and above the plane of the grate-bars the sidesof the combustion-chamber X incline gradually inward to the top of thefire-box. (See Fig. 2, Sheet 2.) The grate-bars I extend to a shortdistance behind the vertical plane, in which thelowestpoint of the. wallH is situated. Immediately at the rear of l the grate-bars rises anabutment or wall, K. In front of the wall H, and parallel thereto,extends the perforated plate L, being sufficiently far removed from thewall to allow air to pass between the two sufficient for the perfectcombustion of fuel. A space sufficient for the same purpose is leftbetween the top of the furnace and the plate. The plate is perforatedwith holes e. The receiving-chamber or radiator M, which receives theheated products of combustion, and imparts their heat to the air whichis to supply the house, is constructed as follows:

The back N of the wall H, beginning at the bottom of the latter, extendsupward and backward at nearly the same angle vas the wallH extendsforward, and meets the top 0 of the chamber M. This top is preferablyhorizontal. The floor P of this chamber be-' gins at the top of abutmentK, and extends back horizontally. The mouth of the flue or pipe Q forthe exit of the products of combustion, termed in non-smoke-oonsumin gfurnaces the smokeflue, is situated in this floor, preferably at or nearthe rear thereof, and thence passes vertically down into the horizontalpipe or flue R. The latter pipe extends through both sides of thefurnace, and at one end is provided with cap S, and at the otherpassesout into the smoke-stack. The flue T, which supplies the air, which isto be heated and delivered to the house, incloses the latter portion ofthe pipe R. A space, U, is left between the radiator and the outer wallsof the furnace, through which the air can pass. are tubes connecting theair-space U with the flues or register of the building to be heated. Themode in which my improvements'oper ate is as follows, viz: I make a firein the combustion-chamber in the usual way with wood and coal,preferring,however, thatthesides of the grate-bars shall receive anexcess of wood, shavings being placed in the rears After; starting thefire in therear I commence putting V thecoal in front till it'rolls downand strikes;

abutment K. As fastas the latter consumes I I add-more coal until it iscokedtowithin two 1 inches of the top of the throat m, the latter beingthe opening between the combustion chamber and the radiator M, and lyingbe rwa'llsxfiand K. "Then the combustioncham berma-y'be fillediup tothetop of the h indoor-wand over the top of the fire-bed j andthetop of"the plate L, an-dftheneezdown between the plate and wall H. AllthegasesT ofthe burning fuel 'passover the top of the plate or through theperforations e, and, :mix- 1 ingwiith the air passing down the spacebetween the/wall H and plate L, are carrieddown to the thnoatmand there,in come quen'cenf the intense heat, thesaid"prodrrcts" of combustion areby the aid of "the said air ignited, and the oxygen of the latterchemifcallyunites the carbon, em, of the pro- 1 ducts; The heat thus generatedpassesinto andfills the radiator M, filling the latter byLettersPatentisi A In -a furnace, X, the combinationof openings D m plate L, wail H,and throat m], plate i being removed sufficiently far from wallfHj tof ji allow the passage -ofa'ir 'betwee them, as and thence itpasses downflue *Q iinto smoke or eduction pipe R, giving ofl'lon its way throughthe latter much of its heat, the cool air pass ing fromthe outeratmosphere through induction-pipe T. Thus much of the heat which wouldotherwise pass 0E through pipe '1 and be wasted is utilized. Thelocation of 'p'ipeQ in the of the radiator practically preservesthelatter from the action of V theiire, and moreequally distributes theheat,

because the heat has a tendency to ascend,

and in order to get out must first fill the entire radiator; whereas,when the smoke-pipe "is placed, as is "usually the case, in the top orupper part of the radiator, the upper part is overheated, while thelower portion is left comparatively cool. The provision of cap S enablesthe pipe to 'be conveniently cleaned of any settlings which in possibly"accumulate therein. v

Whilethe construction-of the com bustion lcham oer "herein shown:andflescribed is espe- !cially adapted for a hot-air, furnace, El donot limit the application efit to that: ems of 'iurmecca-hut claim itasa' smoke-consuming fur 11 some for any purpose to which it'canhexapplied. The named-is true offzthe The furnace, which feedsthrough m, may be zofany desired construction, and theadvantages'resulting from: the arrangementof pipes a What I claim new, ea imei in presence of- D. P. KENNEDY,

res onses more; i

